Damrong Padoongchob creator Samorn Muttamara Chairperson Lohani, B.N. Examination Committee Vigneswaran, S. Examination Committee Carl Duisberg Gesellschaft e.V Scholarship Donor text th Bangkok Asian Institute of Technology. 1985 monographic eng 95 p. The limitation of budget is the main cause of implementing piped water supply in Thailand, so this study deals with developing models available for predicting construction costs, O&M costs including operation unit costs of any plant existing. Data performed in the study was collected from 334 waterworks located in 10 regional PWA centers. Construction costs were adjusted to the year 1984 and determined in 5 components Intake, Treatment Unit, Distribution Systems, Non Process Parts and Administrative Expenses. O+M costs were also detennined in 5 sections - Chemicals, Energy, Labor, Maintenance materials and miscellaneous. Six mathematical models of construction costs and six of O&M costs were developed from analysis of 334 waterworks data by two methods of regression analysis - SPSS- X program and Curve Fitter program. The comparison of models shows the better applicability of models from SPSS- X program indicated by less standard deviation. A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1985 Water-supply, Rural Cost effectiveness Water-supply, Rural Thailand Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B20028 http://203.159.5.9/ait-thesis/detail.php?q=B20028 011298 20260818085259.0